Refrigeration



Jan. 26 1926.

K. DE LONY REFRIGERATION Filed March 24, 1925 Patented'Jan. 26, 1926.

UNITED STATES PATENT OFFICE...

KNU'D DE 'LONY OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO JOHANNES SCHIOTT,OF

GREENS FARMS, CONNECTICUT.

. i REFRIGERATION.

' Application filed March 24, 1925. Serial No. 17,876.

I '0 all whom it may. concern Be it known that I, KNUD on LoNY, acitizen of the United States, residing at the city of NewI-I-aven, inthe county of New Haven and State of Connecticut, have invented certainnew and useful Improvements in Refrigeration; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to refrigeration and has for its object toincreasethe efiiciency of refrigerator" engines of the compression type. v

The accompanying drawing shows a schematic elevation ofv a combinedcompression type refrigerator plant employing two compressors with myinvention attached.

The invention consists in the introduction of a dilferential drivemounted in a housin 1 between the shafts a and b of thelow and highpressure compressors 2 and 3 that are driven from a common source ofpower by a belt 16 which turns the housing 1.

The differential drive is preferably shown herein as mechanical, but thesame effect may be obtained by-other means.

4 is the evaporator, 5 the receiver and intercooler, 6 the condenser and7 the expan sion valve, all of the'usual orknown type.

The operation is as follows y The low pressure compressor 2 draws thevaporized refrigerant from the vaporizer 4,

" compresses it to the receiver pressure and discharges it to thereceiver and .intercooler 5, where the superheat is removed by a cooliugmedium entering at 10 and leaving at 11'. The high pressure compressor 3draws thevapor from the receiver 5, compresses it to the condenserpressure and discharges it to the condenser 6, whereit is liquefied bythe cooling med'ium'entering at 12 and pands t'hrougl'i the expansionvalve 7 to the vaporizer 4, where it is vaporized, thus coolingthe brineentering at 14 and leaving at 15.

ferential drive, thetorques on the compressor shafts a and b are equal.With the same load on both compressors they will run with the speed ofthe driving gear or housing 1, but as, the load changes-with a change inthe saturation temperatures of the condenser r l'eavingat 13; Theliquefied refrigerant ex- As the power is distributed through a dif-' orthe vaporizer, due to the change in density ofthe refrigerant, therelation of the speeds of the compressors will change, but their sumwill remain equal to double the speed of the driving gear. Inall'instances, irrespective of the means employed to effect thedifferential drive; by reason of this variation of speed of the twocompressors, the capacity of the plant increases automatically with anincrease in the-saturation temperature of the condenser owingto theequal torque, the

fly wheels 17 and 18 serving to temporarily store the ener y, and as theengine works without throttling or so-called capacity regulation,its'superior efficiency is at once recognlzed.

The invention has been shown only in connection with a compound type,but can be attached to a two cycle type or to any refrigerator plantemploying two comp-ressors.

What is claimed is 1. In a compound refrigerator having a condenser, anevaporator and two compressors with shafts driven from a common sourceof power, the combination of the compressor shafts with a differentialdrive,

distributing said powerv whereby the ratiov between the two torquesimparted to each compressor is maintained constant.

2 The process of refrigeration which consists in' compressing arefrigerant in two compressors, condensing and eva orating the saidrefrigerant, and'in automatlcally maintaining constant the I relationbetween the torques delivered to the compressors.

3. In refrigerating apparatus, a condenser, an evaporator connected tothe condenser and two compressors connected in series to withdrawrefrigerant from the evaporator and to force it under pressure into thecondenser, said'compr-essors eachprovided with a drive shaft, and meansto rotate the shafts comprisinga differential drive.

4. In refrigerating apparatus, a condenser,,;'

an evaporator connected to the condenser, a

plurality of compressors connected in series between the evaporator andthe condenser,

and automatic means for supplying equal torque to each of thecompressors.

In testimony whereof I aflix my signat-ure hereto.

